SpringBoot整合

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SpringBoot整合

1、创建工程

略

目录结构

2、导入依赖

注意依赖版本和安装的版本一致

  1. <properties>
  2. <java.version>1.8</java.version>
  3. <!-- 统一版本 -->
  4. <elasticsearch.version>7.6.1</elasticsearch.version>
  5. </properties>

导入elasticsearch

  1. <dependency>
  2. <groupId>org.springframework.boot</groupId>
  3. <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
  4. </dependency>

提前导入fastjson、lombok

  1. <dependency>
  2. <groupId>com.alibaba</groupId>
  3. <artifactId>fastjson</artifactId>
  4. <version>1.2.70</version>
  5. </dependency>
  6. <!-- lombok需要安装插件 -->
  7. <dependency>
  8. <groupId>org.projectlombok</groupId>
  9. <artifactId>lombok</artifactId>
  10. <optional>true</optional>
  11. </dependency>

3、创建并编写配置类

  1. @Configuration
  2. public class ElasticSearchConfig
  4. // 注册 rest高级客户端
  5. @Bean
  6. public RestHighLevelClient restHighLevelClient()
  7. RestHighLevelClient client = new RestHighLevelClient(
  8. RestClient.builder(
  9. new HttpHost("127.0.0.1",9200,"http")
  10. )
  11. );
  12. return client;

4、创建并编写实体类

  1. @Data
  2. @NoArgsConstructor
  3. @AllArgsConstructor
  4. public class User implements Serializable
  6. private static final long serialVersionUID = -3843548915035470817L;
  8. private String name;
  9. private Integer age;

5、测试

所有测试均在 SpringbootElasticsearchApplicationTests中编写

注入 RestHighLevelClient

  1. @Autowired
  2. public RestHighLevelClient restHighLevelClient;

索引的操作

1、索引的创建
  1. // 测试索引的创建， Request PUT liuyou_index
  2. @Test
  3. public void testCreateIndex() throws IOException
  4. CreateIndexRequest request = new CreateIndexRequest("liuyou_index");
  5. CreateIndexResponse response = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
  7. System.out.println(response.isAcknowledged());// 查看是否创建成功
  8. System.out.println(response);// 查看返回对象
  9. restHighLevelClient.close();
2、索引的获取，并判断其是否存在
  1. // 测试获取索引，并判断其是否存在
  2. @Test
  3. public void testIndexIsExists() throws IOException
  4. GetIndexRequest request = new GetIndexRequest("index");
  5. boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
  6. System.out.println(exists);// 索引是否存在
  7. restHighLevelClient.close();
3、索引的删除
  1. // 测试索引删除
  2. @Test
  3. public void testDeleteIndex() throws IOException
  4. DeleteIndexRequest request = new DeleteIndexRequest("liuyou_index");
  5. AcknowledgedResponse response = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
  6. System.out.println(response.isAcknowledged());// 是否删除成功
  7. restHighLevelClient.close();

文档的操作

1、文档的添加
  1. // 测试添加文档(先创建一个User实体类，添加fastjson依赖)
  2. @Test
  3. public void testAddDocument() throws IOException
  4. // 创建一个User对象
  5. User liuyou = new User("liuyou", 18);
  6. // 创建请求
  7. IndexRequest request = new IndexRequest("liuyou_index");
  8. // 制定规则 PUT /liuyou_index/_doc/1
  9. request.id("1");// 设置文档ID
  10. request.timeout(TimeValue.timeValueMillis(1000));// request.timeout("1s")
  11. // 将我们的数据放入请求中
  12. request.source(JSON.toJSONString(liuyou), XContentType.JSON);
  13. // 客户端发送请求，获取响应的结果
  14. IndexResponse response = restHighLevelClient.index(request, RequestOptions.DEFAULT);
  15. System.out.println(response.status());// 获取建立索引的状态信息 CREATED
  16. System.out.println(response);// 查看返回内容 IndexResponse[index=liuyou_index,type=_doc,id=1,version=1,result=created,seqNo=0,primaryTerm=1,shards="total":2,"successful":1,"failed":0]
2、文档信息的获取
  1. // 测试获得文档信息
  2. @Test
  3. public void testGetDocument() throws IOException
  4. GetRequest request = new GetRequest("liuyou_index","1");
  5. GetResponse response = restHighLevelClient.get(request, RequestOptions.DEFAULT);
  6. System.out.println(response.getSourceAsString());// 打印文档内容
  7. System.out.println(request);// 返回的全部内容和命令是一样的
  8. restHighLevelClient.close();
3、文档的获取，并判断其是否存在
  1. // 获取文档，判断是否存在 get /liuyou_index/_doc/1
  2. @Test
  3. public void testDocumentIsExists() throws IOException
  4. GetRequest request = new GetRequest("liuyou_index", "1");
  5. // 不获取返回的 _source的上下文了
  6. request.fetchSourceContext(new FetchSourceContext(false));
  7. request.storedFields("_none_");
  9. boolean exists = restHighLevelClient.exists(request, RequestOptions.DEFAULT);
  10. System.out.println(exists);
4、文档的更新
  1. // 测试更新文档内容
  2. @Test
  3. public void testUpdateDocument() throws IOException
  4. UpdateRequest request = new UpdateRequest("liuyou_index", "1");
  5. User user = new User("lmk",11);
  6. request.doc(JSON.toJSONString(user),XContentType.JSON);
  7. UpdateResponse response = restHighLevelClient.update(request, RequestOptions.DEFAULT);
  8. System.out.println(response.status()); // OK
  9. restHighLevelClient.close();
5、文档的删除
  1. // 测试删除文档
  2. @Test
  3. public void testDeleteDocument() throws IOException
  4. DeleteRequest request = new DeleteRequest("liuyou_index", "1");
  5. request.timeout("1s");
  6. DeleteResponse response = restHighLevelClient.delete(request, RequestOptions.DEFAULT);
  7. System.out.println(response.status());// OK
6、文档的查询
  1. // 查询
  2. // SearchRequest 搜索请求
  3. // SearchSourceBuilder 条件构造
  4. // HighlightBuilder 高亮
  5. // TermQueryBuilder 精确查询
  6. // MatchAllQueryBuilder
  7. // xxxQueryBuilder ...
  8. @Test
  9. public void testSearch() throws IOException
  10. // 1.创建查询请求对象
  11. SearchRequest searchRequest = new SearchRequest();
  13. // 2.构建搜索条件
  14. SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
  15. // (1)查询条件 使用QueryBuilders工具类创建
  16. // 精确查询
  17. TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "liuyou");
  18. // // 匹配查询
  19. // MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();
  22. // (2)其他<可有可无>：（可以参考 SearchSourceBuilder 的字段部分）
  23. // 设置高亮
  24. searchSourceBuilder.highlighter(new HighlightBuilder());
  25. // // 分页
  26. // searchSourceBuilder.from();
  27. // searchSourceBuilder.size();
  28. searchSourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
  29. // (3)条件投入
  30. searchSourceBuilder.query(termQueryBuilder);
  32. // 3.添加条件到请求
  33. searchRequest.source(searchSourceBuilder);
  35. // 4.客户端查询请求
  36. SearchResponse search = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  38. // 5.查看返回结果
  39. SearchHits hits = search.getHits();
  40. System.out.println(JSON.toJSONString(hits));
  41. System.out.println("=======================");
  42. for (SearchHit documentFields : hits.getHits())
  43. System.out.println(documentFields.getSourceAsMap());
前面的操作都无法批量添加数据
  1. // 上面的这些api无法批量增加数据（只会保留最后一个source）
  2. @Test
  3. public void test() throws IOException
  4. IndexRequest request = new IndexRequest("bulk");// 没有id会自动生成一个随机ID
  5. request.source(JSON.toJSONString(new User("liu",1)),XContentType.JSON);
  6. request.source(JSON.toJSONString(new User("min",2)),XContentType.JSON);
  7. request.source(JSON.toJSONString(new User("kai",3)),XContentType.JSON);
  8. IndexResponse index = restHighLevelClient.index(request, RequestOptions.DEFAULT);
  9. System.out.println(index.status());// created
7、批量添加数据
  1. // 特殊的，真的项目一般会 批量插入数据
  2. @Test
  3. public void testBulk() throws IOException
  4. BulkRequest bulkRequest = new BulkRequest();
  5. bulkRequest.timeout("10s");
  7. ArrayList<User> users = new ArrayList<>();
  8. users.add(new User("liuyou-1",1));
  9. users.add(new User("liuyou-2",2));
  10. users.add(new User("liuyou-3",3));
  11. users.add(new User("liuyou-4",4));
  12. users.add(new User("liuyou-5",5));
  13. users.add(new User("liuyou-6",6));
  15. // 批量请求处理
  16. for (int i = 0; i < users.size(); i++)
  17. bulkRequest.add(
  18. // 这里是数据信息
  19. new IndexRequest("bulk")
  20. .id(""+(i + 1)) // 没有设置id 会自定生成一个随机id
  21. .source(JSON.toJSONString(users.get(i)),XContentType.JSON)
  22. );
  25. BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
  26. System.out.println(bulk.status());// ok
 

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